Abstract:

Abstract: An experiment was carried out to study the effect of formulated fertilization on agronomic characters and yield of rice according to the theory of“3414”regression optimum design, and studied experiment of fertilizer by N、P、K. The results show that, Effect of formulated fertilization on agronomic characters in the different treatment of rice, and actual yield of each fertilizer treatment was enhanced by comparing with CK, in the field of middle levels of N, low P and K, application of N 180 kg/hm2, P 90 kg/hm2, K 67.5kg/hm2 can reach the highest yield of 10234.5kg/hm2. Regression recommended that the optimum fertilizing quantity of N, P, K is N 191.55 kg/hm2, P 95.85 kg/hm2and K 64.80 kg/hm2. N 188~192kg/hm2, P 85~90 kg/hm2 and K 63~66 kg/hm2 are strongly recommended by equation of experiment of fertilizer and the best fertilization, and experience of spread manure in agriculture.